Mechanical properties of metal-ceramic nanolaminates: Effect of constraint and temperature

被引：53

作者：

Yang, L. W. ^{[1
,4
,5
]}

Mayer, C. ^{[2
]}

Li, N. ^{[3
,4
]}

Baldwin, J. K. ^{[3
,4
]}

Mara, N. A. ^{[3
,4
]}

Chawla, N. ^{[2
]}

Molina-Aldareguia, J. M. ^{[1
]}

Llorca, J. ^{[1
,4
,5
]}

机构：

[1] IMDEA Mat Inst, C Eric Kandel 2, Madrid 28906, Spain

[2] Arizona State Univ, Mat Sci & Engn, Tempe, AZ 85287 USA

[3] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA

[4] Los Alamos Natl Lab, Inst Mat Sci, Los Alamos, NM 87545 USA

[5] Univ Politecn Madrid, Dept Mat Sci, ETS Ingenieros Caminos, E-28040 Madrid, Spain

来源：

ACTA MATERIALIA | 2018年 / 142卷

基金：

美国国家科学基金会;

关键词：

Micropillar compression; Nanoindentation; Composites; Nanolaminates; MICROPILLAR COMPRESSION; REINFORCEMENT FRACTURE; NANOINDENTATION; DEFORMATION; BEHAVIOR; THICKNESS; DUCTILITY; HARDNESS; SIZE;

D O I：

10.1016/j.actamat.2017.09.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Al/SiC nanolaminates with equal nominal thicknesses of the Al and SiC layers (10, 25, 50 and 100 nm) were manufactured by magnetron sputtering. The mechanical properties were measured at 25 degrees C and 100 degrees C by means of nanoindentation and micropillar compression tests and the deformation mechanisms were analyzed by in situ micropillar compression tests in the transmission electron microscope. In addition, finite element simulations of both tests were carried out to ascertain the role played by the strength of the Al layers and by the elastic constraint of the ceramic layers on the plastic flow of Al in the mechanical response. It was found that the mechanical response was mainly controlled by the constraint during nanoindentation or micropillar compression tests of very thin layered (approximate to 10 nm) laminates, while the influence of the strength of Al layers was not as critical. This behavior was reversed, however, for thick layered laminates (100 nm). These mechanisms point to the different effects of layer thickness during nanoindentation and micropillar compression, at both temperatures, and showed the critical role played by constraint on the mechanical response of nanolaminates made of materials with a very large difference in the elasto-plastic properties. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：37 / 48

页数：12

共 21 条

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